Pipe coupling



Patented l' 'eb. 1946 v l PIPE COUPLING Arthur L. Parker, Cleveland, Ohio, assignor to The Parker Appliance Company, Cleveland, Ohio, a corporation of Ohio Application May 18, 1944, Serial No. 536,177

2' Claims. (Cl. 285-55) UNITED STATES PATENT ornca The invention relates to new and useful imother part. The elbow pipe 2 also has a threaded provements in a pipe coupling and more parsection 4 for connection with the boss I. The ticularly a coupling wherein a pipe is secured to boss has a bore therethrough which is provided a fixed part in a set angular position relative with a smooth section 6 adjacent the outer end thereto. of the boss and a threaded section 'I which ex- An object of the invention is to provide a coutends inwardly from the smooth section 8. The pling which may be secured in a set position by threaded portion 4 of the pipe is adapted to ena lock collar which is normally free to slide and gage this threaded portion 1 of the boss for'the rotate on said pipe. securing of the pipe to the boss;

A further object of the invention is to provide The boss I is also counterbored to form a wall a coupling of the above type wherein the lock 8 that is spaced away from the smooth wall 9 of collar cooperates with the fixed part in form-'' the elbow pipe when the elbow pipe is in its set ing a recess for a gasket which seals the conposition relative to the boss. The space between nection between the parts. the annular wall 8 of the boss and the outer face A further object of the invention is to provide of the pipe provides a recess for a sealing gasket. a coupling of the above type wherein an elastic The pipe 2 has a projecting shoulder l0 formed gasket is employed and the recess and gasket thereon which shoulder is spaced away from the are so dimensioned that the gasket seals the conend ll of the boss. In this space between the nection solely by the expansion thereof. shoulder and the end of the boss is a locking These and other objects will in part be obvicollar l2. The shoulder I0 is formed with a cam vous and will in part be hereinafter more fully face. Asillustrated in Figures 5 and 6, there are disclosed. a series of inclined faces. The inclined faces 13 In the drawingand M are oppositely inclined away from the Figure 1 is a side elevation of a pipe coupling collar. The faces [3' and I5 are oppositely inembodying the improvements; clined toward the collar. As shown in the draw- Flgure 2 is a fragmentary view similar to Figing, there are four of these inclined faces which ure 1 with the pipe and nut backed off for posiconstitute the wedging cam surface of the shoultioning the pipe in a desired set angular posi-, der. The collar l2 has a smooth bore so that it tion relative to the fixed part; can slide and rotate freely on the smooth section Figure 3 is a view similar to Figure 2 showing of the pipe. The collar on the face thereof adthe lock collar turned for locking the pipe in jacent the shoulder is provided with a similarly the set angular position; shaped cam which cooperates with the cam face Figure 4 is a view in longitudinal section of on the shoulder. This cam face of the collar has a portion of the coupling shown in Figures 1 to 3 inclined portions i6 and I! which are shaped and w the Parts in locked Position; disposed to conform to the inclined faces I3 and Figure 5 is a fragmentary side view of the M of the cam on the shoulder of the pipe. The p p collar also has four of these inclined faces and Figure 6 is a fragmentary side view of the pipe the inclined faces l6 and I8 (Figure 8) correas seen from a di rent an l spond to the inclined faces l3 and I5 (Figure 6) Figure 7 is a side view of the collar; 40 on the pipe. It is to be understood that these Fi re 8 is a similar view of the collar from inclined faces are all of similar shape and any difierent n pair of opposed faces on the collar and pipe Figure 9 is a view similar to Figure 4 but showshoulder may cooperate with each other in the ing a slightly modified form of recess for the locking of the pipe at a set angular position. sealing gasket. I he pipe with the collar applied thereto is The invention has vto do with a coupling for threaded into the boss until the collar contacts pipes and more particularly an elbow pipe which with the smooth end of the boss. At this time must be set in a certain angular position relathe inclined faces are fully engaged. Both the tive o a fix P rt with which it is connected. collar and the elbow are backed ofi until the elbow In the drawing a boss is indicated at l which outletisplaced in the desired set position. Then boss forms part of a tank to which the pipe is the collar alone is turned in either direction and to be secured. This boss will be referred to as the collar is turned the cam faces sliding one hereinafter as a fixed member or part. The pipe on the other will force the collar into engagement is indicated at 2. Said pipe has an elbow secwith the end of the boss and the wedging action tion 3 which is threaded for attachment to anof the cam faces will lock the pipe in its set position. The cam' faces are so dimensioned relative to the threaded connection between the pipe and the boss as to enable the elbow outlet to be backed Oh to the extent of 360, if desired, and then the collar turned to effect the locking of the elbow in the desired set position. The gasket is indicated at i9. Said. gasket is ring-shaped and is normally circular in cross section. It is dimensioned so that when placed on the smooth section of the pipe it will make a sealing contact boss. The positioning of the elbow outlet with this triangular-shaped recess for. the gasket is.

therewith. It is also dimensioned so that the normal cross sectional diameter of the gasket is a greater than the distance between the walls 2 collar and the boss closes the recess and complete- 1y houses the gasket. The gasket is an elastic gasket, preferabl of rubber and when it is forced into the recess it is deformed so that it becomes generally elliptical in cross section. The tendency of the gasket to expand to its normal circular shape in cross section will cause the gasket to make tight sealing contact with the walls 2 and 8 of the recess in which the gasket is placed.

The recess is of greater length than the major diameter of the deformed gasket when sealing the Joint. Any fluid leaking through the threaded connection between the pipe and the boss and bearing against the gasket will tend to force the gasket into even tighter sealing contact with the parallel walls 8 and 9.

y In Figure 9 of the drawing there is shown a slightly modified form of recess for the sealing gasket. Otherwise the'parts are similar to those described above and like numerals have been placed thereon. The boss I has the smooth portion 6 and thread I for engagement with the thread 4 of the pipe. Instead of providing a counter-bore at the end of the boss, the inner portion of the end is chamfered as indicated at 20.

The collar I2 instead of having a flat face extending all the way into the pipe, is likewise chamfered as indicated at 2|. When the collar is in contact with the end of the bOSs there is a triangular-shaped recess provided by the walls of these chamfers 20 and 2| and the outer face of the smooth portion 9 of the pipe. Located in this triangular recess is a gasket 22. The gasket is ring-shaped and is normally circular in cross section. This gasket is dimensioned so that when the collar makes metal to metal contact with the end of the boss the gasket will make a substantial line sealing contact with outer surface of the pipe and with the walls of the ehamfered parts 20 and 2|. Thegasket should notbe so large that any portion thereof will be extruded between the collar and the boss and thus prevent contact between these parts. It may, however, be

dimensioned so as to substantially fill the triangular space when the collar contacts with the accomplished in, the manner above described.

' The pipe with the gasket and collar assembled thereon is threaded into the boss until the collar contacts therewith and then the pipe and collar are backed off until the elbow outlet is set in the position desired, after which the collar may be turned in either direction and the cam faces will force the collar against the end of the boss and thus lock the pipe in its set position.

While the invention has been shown as applied to the setting of an elbow outlet in a predetermined angular position relative to the boss, it will be understood that the invention may be applied to the connecting of a pipe of any type to a flxedpart where it is desired to have a set angular position or a set longitudinal position of the pipe relative to the boss. While the cam members are shown as formed by four sets of inclined faces, it will be understood that more or less inclined faces can be used without departing from the spirit of the invention as set forth in the a pended claims. I claim:

- 1. A pipe coupling comprising a fixed member having a bore provided with a smooth section at its outer end and a threaded section spaced inwardly therefrom, apipe having a threaded connection with said fixed member, said pipe having a shoulder spaced away from the end of the fixed member when the parts are connected, and a lock collar on said pipe between the end of the fixed member and said shoulder, said shoulder and collar having cooperating cam faces for forcing the collar against the end of the fixed member for locking the pipe in a set angular position.

. 2. A pipe coupling comprising a fixed member having a bore provided with a thread, a pipe having a threaded connection with the. fixed member, said pipe having a shoulder spaced away from the end of the fixed member when the parts are connected, a lock collar on said p e between the end of the fixed member and said shoulder, said collar having cam faces thereon and fixed cam faces cooperating therewith, said cam faces being disposed so that the rotation of the collar will lock the pipe in a set angular position.

ARTHUR L. PARKER. 

